[Python]Use a repetitive statement to find the digits of the entered integer

I want to code to find the number of digits of the integer when I enter the integer using the repetition sentence.

Let's put an integer in g I tried to print the (i+1) value by dividing g continuously by 10 and dividing it until the quotient was less than 1, but it didn't work fori in range(0,g//10!=0) doesn't seem to recognize the g//10!=0 part, so how should I modify it?